Apps to Support for Multiple Users

OX Open-Xchange is a comprehensive web-based suite designed for communication, collaboration, and office productivity, offering features like email, calendaring, task management, and document sharing, seamlessly integrating across devices.

PmWiki is a powerful and flexible open-source wiki-based content management system designed for collaborative documentation, knowledge sharing, and website creation. It focuses on ease of use and extensibility.

Logitech Media Server, formerly known as SlimServer and Squeezebox Server, is a robust open-source streaming audio server designed to organize and stream your digital music collection.

Stoq is a robust, open-source ERP solution designed for small to medium-sized businesses, particularly in retail environments. It offers comprehensive tools for sales, inventory, and customer management.

Horde Groupware is a free, web-based suite of applications designed for collaboration and productivity. Built on the robust Horde framework, it offers a comprehensive set of tools including webmail, calendar, task management, and note-taking, providing an integrated platform for individuals and teams.

Baïkal is a lightweight and easy-to-use CalDAV and CardDAV server, providing a simple way to sync your calendars and contacts across various devices and applications. Built upon the robust sabre/dav library, it offers a straightforward administrative interface for seamless management of users and data.

Open Atrium is a powerful open-source collaboration and project management platform built on Drupal. It provides a modular framework to create customized intranets, team sites, and project workspaces, facilitating communication, document sharing, task management, and more within organizations.

ERPNext is a comprehensive and user-friendly open-source Enterprise Resource Planning (ERP) software designed for businesses of all sizes. It integrates various business functions like accounting, CRM, manufacturing, sales, purchase, inventory, and project management into a single platform.

OpenNote is a free and open-source web-based note-taking application designed as an alternative to commercial offerings like OneNote and Evernote. It focuses on providing a lightweight yet feature-rich environment for organizing your thoughts and information.

Roundcube is a free and open-source webmail client providing a modern, user-friendly interface to access and manage your email via IMAP. It is designed for easy self-hosting and offers extensive customization options.

DokuWiki is a popular open-source wiki software designed for simplicity, versatility, and scalability. It focuses on plain text files for data storage, eliminating the need for a database and offering a lightweight, portable, and easy-to-maintain solution for documentation, knowledge sharing, and collaborative content creation.

ProtonMail is a leading secure email service utilizing end-to-end encryption and zero-access architecture to protect user privacy. Developed by scientists at CERN, it offers a robust and user-friendly platform for sending and receiving confidential communications.